This bullet style carb cap for the RöK Full Spectrum is made with iridescent borosilicate glass and measures 21mm in diameter and 42mm tall. Made for use with the XL Cloud Collar. Provides an excellent air seal with the beveled edge of the silicone collar. The cap can also be used with a variety of banger nails.

Note: The cap has an extended nipple that will not allow it to work with the standard silicone collar that comes with the your original RöK Electric Dab Rig.